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K&N RK Series Air Filter Kit

J&P Cycles Part Number: 402-453

Manufacturer Part Number: RK-3931

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Description for K&N RK Series Air Filter Kit

• Oversized cast-aluminum backing plate with internal-run breather system

• Features a built-in dyno-tuned velocity stack

• Retains factory air cleaner cover

• Includes washable/reusable K&N high-flow air filter

Product Specs

Product Specs for K&N RK Series Air Filter Kit

Manufacturer Part Number:
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Fitment Questions?

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Compatible Models

Harley-Davidson® Models

  • Dyna Fat Bob CVO FXDFSE : 2009
  • Dyna Fat Bob CVO FXDFSE2 : 2010
  • Dyna Fat Bob FXDF : 2008–2017
  • Dyna Low Rider FXDL : 2008–2013, 2015–2017
  • Dyna Street Bob FXDB : 2008–2012
  • Dyna Super Glide Custom Anniversary FXDC : 2013
  • Dyna Super Glide Custom FXDC : 2008–2014
  • Dyna Super Glide CVO FXDSE2 : 2008
  • Dyna Super Glide FXD : 2008–2010
  • Dyna Switchback FLD : 2012–2016
  • Dyna Wide Glide FXDWG : 2008, 2010–2017
Customer Reviews

Customer Reviews for K&N RK Series Air Filter Kit

Overall Rating

5 out of 5 stars (based on 17 reviews)

5 stars (12)

4 stars (4)

3 stars (1)

2 stars (0)

1 star (0)

0 stars (0)


The K&N Air Cleaner was very straightforward to install, and was complete. It is unobtrusive on the FXDX and works well.


The K&N filter assembly installed easily using the simple to follow instructions. The filter lets the engine breath easier giving it better throttle responce and it retains the stock look.


Easy to install and makes the bike look better and also increases performance. Great Product.


The K&N high flow air cleaner was easy to install and significantly improved the air intake and performance. The size of the air filter did not extend further than the original equipmet air cleaner. The installation instructions were accurate and easy to follow. I am glad that I chose the K&N air cleaner.


Easy installation, a must for any V&H pipe and FuelPak.


Fairly easy to install.Noticeable horsepower increase and throttle responce.


pechased the K/N filter assembly for my 2006 Road King Harley. It is every thing thaty I have read about. Installed easy, fits nice, retains the stock look. Performance and workmanship is top shelf I would recomend this product to all.


Beauty ring listed in catalog was missing


Works as advertised.


Straight forward installation. Good instructions. Think the design could be better. Improved throttle response. Happy with the purchase. Have K&N in all vehicles.


Very happy with this purchase easy to install took 20 minutes tops. Sounds good and noticeable increase in power.


Works great, easy to install.


Easy install. Was able to use stock air filter cover.


Easy install, and could tell a difference! I'd recommend this, if you want to still keep the "stock" look.


You need to have the stock throttle body support bracket still attached to be able to install this kit.


Super easy install. I like being able to use my stock breather cover. Keeps the water out and nobody knows what you have. I added a super tuner to take better advantage of kit


really impressed with this kit. Awesome fit and makes bike run alot better. Make sure to get some stock breather bolts if you have any other kind of filter installed.

Shipping Note

Due to state regulations we cannot ship this item to the state of California.

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